Improvement in tools



UNITED STATES PATENT EricE.

JOHN ADAMS THAYER, OF EAST BOSTON, MASSACHUSETTS.

IMPROVEMENT IN TOOLS.

Specification forming part of Letters Patent No. 35,715, dated June 24, 1862.

To all whom it may concern:

Be it known that I, JOHN ADAMs THAYER, of East Boston, in the county of Suffolk and State of Massachusetts, have invented a new and Improved Compound Tool; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, in which- Figure 1 represents a side elevation of my improved compound tool, and Fig. 2 a sectional elevation of the saine.

My invention consists in the combination, in one instrument constituting a compound tool, of the following elements, viz: tirst, a shank or bar graduated to form a scale, the ends of which are shaped, respectively, into a screwdriver and claw, as hereinafter described; second, a handle or sleeve capable of adjust ment upon and along the said shank or bar,

substantially as hereinafter set forth; third, a hammer-head adj ust-able along the said shank or scale and provided with a bulging center piece, so arranged as to act as the fulcrum to its own claw, as well as to that of the bar.

To enable others skilled in the art to makel and use my improvement, I shall now proceed to describe the construction, arrangement, and

combination of the several parts constituting' my compound tool.

The hammer-head is composed of a perforated ball or bulb, B, from which spring at' diametrically-opposite sides two metal shafts, S, on which are, respectively, formed the hammer-face F and the claw C. To the under side of the hammer-head and bulb is attached a shank, A, hollowed out to iit the scale or bar J, along and upon which it is capable of being slid and adjusted by means of a thumbscrew, E. The opening A of the bulb is of such dimension as to completely conceal withi n its cavity the claw I), formed upon the end of the bar or scale. The latter' (marked in the drawings J) is made of metal, preferably of steel. It may be square or tlat,and may have bevel edges, or it may have the edges rounded off. One or all' of its surfaces may have marks engraved upon it orthem to indicatedivisions and subdivisions whereby to measure lengths according toany given standard. Its upper end, P, is divided, bent, and beveled to form a claw, while its under end, D, is beveled on,

both sides to constitute a screw-driver, a handle or sleeve, V, strengthened by means of cup-ferrules, clasping metal disks O on the upper and lower ends. It is so adapted to the shank as to allow of its being slid up or down along the scale-bar, and is capable of being fastened thereto in any position required by means of a thumb-screw, T. t

The several parts, individually considered, being familiarly known to mechanics, their respective operations are well understood, and the several uses to which the instrument, as aV whole or in part, may be put will readily suggest themselves. The great advantage of this instrument over those heretofore in use consists in the compactness, necessitating the use of but oneinstrument, when to effect the same obj ect several were heretofore required. Moreover, the ability of adjusting either the hammer-head or handle, or both the hammer-head and handle, to increase or decrease the leverage of the implement, and whereby the same hammer'may answer the purpose of several hammers of different weights, is a saving as well as a great convenience. j

Having thus described my improvements, I wish it to be distinctly understood that I lay no claim to the parts when separately considered, nor do I wish to be understood as claiming the adjustability of either the hammerhead or handle; but

What I do claim, as a new article of manufacture, isd

The compound tool described, embracing the following elements or tools, viz: First, ashank or bar graduated to form a scale, the ends of which are shaped, respectively, into a screw-` driver and claw, as herein described; second, a handle or sleeve capable of adjustment upon and along the said shank or bar, substantially as herein set forth; thi rd, a hammer-head adjustable along the said shank or scale'and provided with a bulging center piece, so arranged as to act as the fulerum to its own claw, as well as to that of the bar, the whole being constructed, arranged, and combined as herein set forth.

JOHN ADAMS THAYER.

IVitiiesses:

AsA OOTTRELL, JOHN NOBLE. 

